# CVE-2023-36038: ASP.NET Core Denial of Service Vulnerability

> Attackers can cause a denial of service in ASP.NET Core applications, requiring developers to apply security patches.

- **Severity:** High 8.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Nov 2023
- **Updated:** 9 Oct 2025
- **Also known as:** BIT-aspnet-core-2023-36038, BIT-dotnet-2023-36038, BIT-dotnet-sdk-2023-36038

## What is CVE-2023-36038?

CVE-2023-36038 is a high-severity denial of service vulnerability in Microsoft Visual Studio 2022, published on 14 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ASP.NET Core Denial of Service Vulnerability

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2023-36038?

3 open source packages ship an affected version, including aspnet-core, dotnet and dotnet-sdk. It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `aspnet-core` | Bitnami | From 8.0.0 | 8.0.1 |
| `dotnet` | Bitnami | All versions to 8.0.0-rc1 | 8.0.0 |
| `dotnet-sdk` | Bitnami | All versions to 8.0.0-rc1 | 8.0.0 |

Products: Microsoft Asp.net Core, Microsoft Visual Studio 2022.

## How do I fix CVE-2023-36038?

Upgrade aspnet-core to 8.0.1 or later.

## Is CVE-2023-36038 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-36038 exists.

## Other vulnerabilities in Microsoft Visual Studio 2022

- [CVE-2025-55315](https://insights.sbomify.com/CVE-2025-55315/): ASP.NET Security Feature Bypass Vulnerability (critical 9.9)
- [CVE-2026-88092](https://insights.sbomify.com/CVE-2026-88092/): ASP.NET Core Tampering Vulnerability (critical 9.4)
- [CVE-2026-40372](https://insights.sbomify.com/CVE-2026-40372/): ASP.NET Core Elevation of Privilege Vulnerability (critical 9.1)
- [CVE-2021-43877](https://insights.sbomify.com/CVE-2021-43877/): ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability (high 8.8)
- [CVE-2020-0603](https://insights.sbomify.com/CVE-2020-0603/): Remote code execution in ASP.NET Core (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-36038 and fix it if it is affected.

What it is: CVE-2023-36038 is a high-severity denial of service vulnerability in Microsoft Visual Studio 2022, published on 14 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-36038 exists.

Affected packages and fixed versions:
- aspnet-core (Bitnami): affected from 8.0.0; fixed in 8.0.1
- dotnet (Bitnami): affected all versions up to 8.0.0-rc1; fixed in 8.0.0
- dotnet-sdk (Bitnami): affected all versions up to 8.0.0-rc1; fixed in 8.0.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-36038/ (Markdown: https://insights.sbomify.com/CVE-2023-36038/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-36038
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-36038
- OSV: https://osv.dev/vulnerability/CVE-2023-36038

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-36038/
Summaries are generated and may contain mistakes; the official description above is the record.